Coordinate input instrument



FIG. 1 is a top front right perspective view of a coordinate input instrument according to my new design;

FIG. 2 is a bottom rear left perspective view thereof;

FIG. 3 is a plan view thereof;

FIG. 4 is a right side elevation view thereof, wherein the left side elevation view is mirror symmetrical to the right side elevation view;

FIG. 5 is a bottom view thereof;

FIG. 6 front elevation view thereof; and,

FIG. 7 rear elevation view thereof. 

CLAIM The ornamental design for a coordinate input instrument, as shown and described. 